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					Originally Posted by gjamo  Heres a pic from the opposite end when it was located in Rockbank before being sold. | 
	
 Thanks, it shows it does not have an engine in the back, behind the cab, as Steve mentioned. So it must be a Chevrolet Earth Borer?
Shown below is a picture of a ACK-353 Earth Borer, according to Vanderveen 100 of these were supplied to the US Signal Corps. It clearly shows the borer engine behind the cab.
 
Source: Life Magazine images @ Google